tree 4b0f7079adb7412148ee2a0f67d48a5d7f3c1ee9
parent e38a73c8f32a47b3520ad10c6f0463ce249f19ed
author Andrew Hsieh <andrewhsieh@google.com> 1362550852 +0800
committer Andrew Hsieh <andrewhsieh@google.com> 1362551894 +0800

Fix build-stlport.sh to use platforms/android-X/arch-<arch> as --sysroot

Actually, --sysroot is setup in builder-funcs.sh builder_begin_android(),
but build-stlport.sh calls builder_reset_cflags/cxxflags and forgets
about that.  The results are

1. toolchains/*/*/*/sysroot is used instead.  During regular rebuild of
   host toolchain, "gen-platforms.sh --minimal" populates it with android-9
   header/libraries so we are fine.  No luck in NDK release package since
   sysroot is removed.
2. stlport armeabi-v7a isn't built with -march=armv7-a -mthumb

The fixes:

1. Modify builder_reset_* to optionally take variable to hold the original
   $_BUILD_* before reset
2. Modify build-stlport.sh to retrieve DEFAULT_CFLAGS and DEFAULT_CXXLAGS
3. Also add -march=armv7-a for arm linker when building for armeabi-v7a

See
  https://code.google.com/p/android/issues/detail?id=52835

Change-Id: I0a52c71a3ceb2b4d1222fdddd0780aa094568689