More x86 fixes and a new stack test.
tree192a202a8e7af871457b6eb137c370a19eb0efd8
-rw-r--r-- 4134 API_CHANGES
-rw-r--r-- 245 INTERNAL_CHANGES
-rw-r--r-- 2384 Makefile
-rw-r--r-- 943 README
drwxr-xr-x - doc
drwxr-xr-x - regex_src
drwxr-xr-x - sljit_src
drwxr-xr-x - test_src