Revert "Enable -Werror=incompatible-function-pointer-types"

This reverts commit 07c362bf7f7a4205dfd002d8607bee4af6ab8b43.

Reason for revert: DroidMonitor: Potential culprit for Bug 304839693 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.”.

Change-Id: Iafb894510c48af2dd8b015d7264a031ff9348884
diff --git a/cc/config/global.go b/cc/config/global.go
index f79d16a..62b008b 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -248,7 +248,6 @@
 		"-Werror=fortify-source",
 
 		"-Werror=address-of-temporary",
-		"-Werror=incompatible-function-pointer-types",
 		"-Werror=null-dereference",
 		"-Werror=return-type",
 
@@ -325,6 +324,10 @@
 		"-fcommon",
 		// http://b/191699019
 		"-Wno-format-insufficient-args",
+		// http://b/296321145
+		// Indicates potential memory or stack corruption, so should be changed
+		// to a hard error. Currently triggered by some vendor code.
+		"-Wno-incompatible-function-pointer-types",
 		// http://b/296321508
 		// Introduced in response to a critical security vulnerability and
 		// should be a hard error - it requires only whitespace changes to fix.