libutils: Fix integer overflows in VectorImpl.

Use external/safe-iop to check for overflows on arithmetic
operations.

Also remove an unnecessary copy of Vector/SharedBuffer from
codeflinger and use the copy from libutils instead.

Note that some of the unit tests are somewhat useless due to
test-runner limitations : gtest's ability to filter on abort message
doesn't work when combined with messages formatted by android's logging
system.

bug: 22953624

Change-Id: I46b1ae8ca1f3a010be13aca36a091e76a97a7b70
diff --git a/libpixelflinger/Android.mk b/libpixelflinger/Android.mk
index 697db25..f02da7f 100644
--- a/libpixelflinger/Android.mk
+++ b/libpixelflinger/Android.mk
@@ -14,8 +14,6 @@
 	codeflinger/load_store.cpp \
 	codeflinger/blending.cpp \
 	codeflinger/texturing.cpp \
-	codeflinger/tinyutils/SharedBuffer.cpp \
-	codeflinger/tinyutils/VectorImpl.cpp \
 	fixed.cpp.arm \
 	picker.cpp.arm \
 	pixelflinger.cpp.arm \
@@ -63,8 +61,9 @@
 LOCAL_SRC_FILES_mips := $(PIXELFLINGER_SRC_FILES_mips)
 LOCAL_CFLAGS := $(PIXELFLINGER_CFLAGS)
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
-LOCAL_C_INCLUDES += $(LOCAL_EXPORT_C_INCLUDE_DIRS)
-LOCAL_SHARED_LIBRARIES := libcutils liblog
+LOCAL_C_INCLUDES += $(LOCAL_EXPORT_C_INCLUDE_DIRS) \
+		    external/safe-iop/include
+LOCAL_SHARED_LIBRARIES := libcutils liblog libutils
 
 # Really this should go away entirely or at least not depend on
 # libhardware, but this at least gets us built.