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Due to a typo in build-gnu-libstdc++.sh and build-funcs.sh,
the armeabi-v7a prebuilt binaries were built assuming a
VFPv3-D32 capable CPU (i.e. 32 FPU double registers,
while the ABI only mandates VFPv3-D16).

This resulted in crashes when running programs linked to it on
Tegra devices and other non-NEON capable ones.

Fixes http://code.google.com/p/android/issues/detail?id=26199

+ new unit test that checks that all our armeabi-v7a prebuilt binaries
  are of the correct type.

Change-Id: I567e202921881f76d1e70bed930182ea7d517b4e