Fix MET to compile using GCC version 10

[jprestop]

Describe the Task

As reported by a user via met-help (https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=97359) met-9.1 does not compile using the GCC version 10 compilers. The issue lies with the compilation of the required BUFRLIB library:
`ufbtab.f:306:31:

288 | DO WHILE(IREADMG(-LUNIT,SUBSET,IDATE).GE.0)
| 2
......
306 | 10 IF(IREADMG(-LUNIT,SUBSET,JDATE).LT.0) GOTO 25
| 1
Error: Rank mismatch between actual argument at (1) and actual argument at (2) (rank-1 and scalar)
ufbtab.f:534:37:

288 | DO WHILE(IREADMG(-LUNIT,SUBSET,IDATE).GE.0)
| 2
......
534 | DO WHILE(IREADMG(-LUNIT,SUBSET,JDATE).GE.0)
| 1
Error: Rank mismatch between actual argument at (1) and actual argument at (2) (rank-1 and scalar)
`
I want to try to reproduce the problem using GCC version 10 and let the developers of BUFRLIB know of the issue.

Time Estimate

1 day

Sub-Issues

Consider breaking the task down into sub-issues.

• No sub-issues required. I expect this to only require a small number of changes.

Relevant Deadlines

None

Funding Source

Define the Metadata

Assignee

• Select engineer(s) or no engineer required
• Select scientist(s) or no scientist required - no scientist required

Labels

• Select component(s)
• Select priority
• Select requestor(s)

Projects and Milestone

• Review projects and select relevant Repository and Organization ones or add "alert:NEED PROJECT ASSIGNMENT" label
• Select milestone to next major version milestone or "Future Versions"

Define Related Issue(s)

Consider the impact to the other METplus components.

• METplus, MET, METdatadb, METviewer, METexpress, METcalcpy, METplotpy

Task Checklist

See the METplus Workflow for details.

• Complete the issue definition above, including the Time Estimate and Funding Source.
• Fork this repository or create a branch of develop.
  Branch name: feature_<Issue Number>_<Description>
• Complete the development and test your changes.
• Add/update log messages for easier debugging.
• Add/update unit tests.
• Add/update documentation.
• Push local changes to GitHub.
• Submit a pull request to merge into develop.
  Pull request: feature <Issue Number> <Description>
• Define the pull request metadata, as permissions allow.
  Select: Reviewer(s), Project(s), Milestone, and Linked issues
• Iterate until the reviewer(s) accept and merge your changes.
• Delete your fork or branch.
• Close this issue.

[jprestop]

In compiling BUFRLIB:
"Error: Rank mismatch between actual argument at (1) and actual argument at (2) (rank-1 and scalar)"

Added:
"-fallow-argument-mismatch" to the compilation of BUFRLIB

From:
https://gcc.gnu.org/gcc-10/changes.html
Mismatches between actual and dummy argument lists in a single file are now rejected with an error. Use the new option -fallow-argument-mismatch to turn these errors into warnings; this option is implied with -std=legacy. -Wargument-mismatch has been removed.

[jprestop]

In compiling HDF4.2r3:
"Error: Type mismatch between actual argument at (1) and actual argument at (2) (CHARACTER(0)/INTEGER(4))"

Added:
"-w -fallow-argument-mismatch" to the compilation of HDF4.2r3 to FFLAGS in the hdf/src/Makefile

[jprestop]

Testing on cheyenne:/glade/p/ral/jntp/MET/MET_cross_platform_testing/met-10.0.0-beta4/gcc/met-10.0.0-beta4 using gnu/10.1.0

[jprestop]

I got a successful compilation on Cheyenne, including using HDF4, HDFEOS, Cairo, and Freetype, the build and test logs can be viewed at /glade/p/ral/jntp/MET/MET_cross_platform_testing/met-10.0.0-beta4/gcc/met-10.0.0-beta4.