Add -fPIC to the shared library builds. Needed by libleveldbjni.

Summary: Add -fPIC to the shared library builds. Needed by libleveldbjni.

Test Plan: build

Reviewers: heyongqiang

Reviewed By: heyongqiang

Differential Revision: https://reviews.facebook.net/D5667

Makefile

@@ -231,8 +231,8 @@ IOSVERSION=$(shell defaults read $(PLATFORMSROOT)/iPhoneOS.platform/versionCFBun
 
 else
 .cc.o:
-	$(CXX) $(CXXFLAGS) -c $< -o $@
+	$(CXX) $(CXXFLAGS) $(PLATFORM_SHARED_CFLAGS) -c $< -o $@
 
 .c.o:
-	$(CC) $(CFLAGS) -c $< -o $@
+	$(CC) $(CFLAGS) $(PLATFORM_SHARED_CFLAGS) -c $< -o $@
 endif