Make sure that the same tests are on all platforms.

In order to be able to generate a list of tests for cts, the same set of
tests must exist across all platforms. This CL adds empty tests where a
test was conditionally compiled out.

This CL creates a single library libBionicTests that includes all of
the tests found in bionic-unit-tests-static.

Also fix a few missing include files in some test files.

Tested by running and compiling the tests for every platform and
verifying the same number of tests are on each platform.

Change-Id: I9989d4bfebb0f9c409a0ce7e87169299eac605a2

tests/inttypes_test.cpp

@@ -19,7 +19,6 @@
 #include <stdio.h>
 #include <inttypes.h>
 
-#if defined(__BIONIC__) // Doesn't work on glibc because we use -m32.
 TEST(inttypes, misc) {
   char buf[512];
 
@@ -39,4 +38,3 @@ TEST(inttypes, misc) {
   sscanf(buf, "%08" SCNuPTR, &u);
   sscanf(buf, "%08" SCNxPTR, &u);
 }
-#endif