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Changed "jump __libc_init" to "call __libc_init" otherwise stack unwinding
past __libc_init may get wrong return address and crash the program or do
wield things.  With "call", return address is pushed on stack and unwinding
stops correctly at _start.  Note that __libc_init never returns, so this
fix wonʼt affect normal program execution.  But just in case it "does"
return, jump to address 0 and halt.

Change-Id: Id194fb32adcbf89ae59939cee33c50b5bbdd36fe

This patch removes all prebuilt C runtime object files from
the ndk/platforms/ directory. We replace them with equivalent
assembly sources lifted from the following directories:

  bionic/libc/private/      (for __dso_handle.S and __dso_handle_so.S)
  bionic/libc/arch-$ARCH/   (for all others)

Note: This requires that your NDK's gen-platforms.sh script be
      capable of rebuilding the object files from sources.
      See https://android-review.googlesource.com/36822

The goal here is to make it much easier to update these files,
and track their changes relative to the content of bionic/lib.
For example to fix the following issues in the future:

Change-Id: If4c84e2584b0e58ca3585b034bb8a13a8add8ab9
http://code.google.com/p/android/issues/detail?id=26911
http://code.google.com/p/android/issues/detail?id=23203

and sources of crt* assembler files

Change-Id: I10547e8b589d36a7937a0833d86d4406a232aa2c
Signed-off-by: Raghu Gandham <raghu@mips.com>

This commit removes duplication of system headers per platform, i.e. remove
copies of common headers like <stdlib.h> from arch-arm/usr/include and arch-x86/usr/include
and move them to a common include directory. More specifically:

- common headers:        android-N/arch-A/usr/include --> android-N/include
- arch-specific headers: android-N/arch-A/usr-include --> android-N/arch-A/include
- arch-specific libs:    android-N/arch-A/usr/lib     --> android-N/arch-A/lib

Change-Id: Ifdba5038d108901931f3e3a7c14ebe6270d2d276

NOTE: This also contains careful separation of API-level-specific headers.
      For example, platforms/android-5/include/pthread.h contains new function
      declarations that are not available when using platforms/android-3/include/pthread.h

NOTE: The NDK's build-platforms.sh script has been updated to understand the new
      layout. This change in develeopment/ndk does not change the layout of
      platform files under $NDK/platforms after build-platforms.sh is called.

The idea is to allow developing the NDK in the open, while
having the platforms and samples under a private branch until
the corresponding release are open-sourced.

Change-Id: Iee995fb6c4d3ee1387dea7486e599e079c9e4c6d

Change-Id: I3f6e29063fe87407ace3fb2731521a5d290d1e75

Signed-off-by: Dave Bort <dbort@android.com>