Roll freetype2 to a10b062 (#6738)

* Roll freetype2 to a10b062

Removes support for uncommon/outdated font formats. This reduces `libflutter.so` by ~131 KB uncompressed or 86 KB compressed.

Going forward, we intent to only support the following formats:

* TrueType fonts (TTF) and TrueType collections (TTC)
* CFF fonts
* OpenType fonts (OTF, both TrueType and CFF variants) and OpenType collections (OTC)
* SFNT-based bitmap fonts, including color Emoji

This change has been announced at https://groups.google.com/forum/#!topic/flutter-announce/N5aeq5aC1To.

* licenses

DEPS

@@ -117,7 +117,7 @@ allowed_hosts = [
 ]
 
 deps = {
-  'src': 'https://github.com/flutter/buildroot.git' + '@' + '11a934e99eaa4aa8e278cd2772aff4f51f1f3c41',
+  'src': 'https://github.com/flutter/buildroot.git' + '@' + '2b7fe9635c00c932f86627988e797a097574929e',
 
    # Fuchsia compatibility
    #
@@ -353,7 +353,7 @@ deps = {
    Var('chromium_git') + '/external/colorama.git' + '@' + '799604a1041e9b3bc5d2789ecbd7e8db2e18e6b8',
 
   'src/third_party/freetype2':
-   Var('fuchsia_git') + '/third_party/freetype2' + '@' + '6581fd3e9c8645f01c0d51e4f53893f5391f2bf3',
+   Var('fuchsia_git') + '/third_party/freetype2' + '@' + 'a10b062df0c8958d69377aa04ea6554a9961a111',
 
   'src/third_party/root_certificates':
    Var('dart_git') + '/root_certificates.git' + '@' + Var('dart_root_certificates_rev'),

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: 0b4495d3d5939970345ed7265c27e7fb
+Signature: ce6277bd5a4db850eabe67354407f156
 
 UNUSED LICENSES: