Revert "Don't re-export libgcc symbols from every object."

For some reason shamu doesn't boot after this change.

Bug: http://b/24166967

This reverts commit e92d25f296af266ebf15bafcc599a91f1f87bd38.

Change-Id: Ibd90c0fccb1fe7446f959c937963d1aa4e43c37c
diff --git a/core/config.mk b/core/config.mk
index 3477ec8..e7a1d20 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -586,11 +586,6 @@
 TARGET_GLOBAL_CFLAGS += $(TARGET_RELEASE_CFLAGS)
 TARGET_GLOBAL_CPPFLAGS += $(TARGET_RELEASE_CPPFLAGS)
 
-# Target modules shouldn't re-export libgcc.a because we don't want other
-# binaries importing them when they should be getting their own copy of the
-# builtins.
-TARGET_GLOBAL_LDFLAGS += -Wl,--exclude-libs,libgcc.a
-
 ifdef TARGET_2ND_ARCH
 $(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_CFLAGS += $(COMMON_GLOBAL_CFLAGS)
 $(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_RELEASE_CFLAGS += $(COMMON_RELEASE_CFLAGS)