QcomModulePkg: Ignore vararg type auto-promotion warning

Ignore vararg parameter type auto-promotion compiler warning
in GetBestLanguages() API.  Default implementation-defined
behavior is already a set ABI and would require standard
interface change.

Also add compile time build log to .gitignore.

Change-Id: I5f6dee2b3b7bb3a59362f2eaa5451c9ecc15123e
diff --git a/.gitignore b/.gitignore
index 821ed66..ac407d6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 Build/

 tags/

+build_modulepkg.log

diff --git a/QcomModulePkg/QcomModulePkg.dsc b/QcomModulePkg/QcomModulePkg.dsc
index b3f3568..7f0b7b0 100644
--- a/QcomModulePkg/QcomModulePkg.dsc
+++ b/QcomModulePkg/QcomModulePkg.dsc
@@ -86,7 +86,7 @@
   ExtractGuidedSectionLib|MdePkg/Library/DxeExtractGuidedSectionLib/DxeExtractGuidedSectionLib.inf
 
 [BuildOptions.AARCH64]
-  GCC:*_*_AARCH64_ARCHCC_FLAGS  = -Wno-shift-negative-value -fstack-protector-strong
+  GCC:*_*_AARCH64_ARCHCC_FLAGS  = -Wno-shift-negative-value -fstack-protector-strong -Wno-varargs
   GCC:*_*_AARCH64_DLINK_FLAGS = -Ttext=0x0
   !if $(VERIFIED_BOOT)
       GCC:*_*_*_CC_FLAGS = -DVERIFIED_BOOT