[asan] Don't use sysconf(_SC_PAGESIZE) on Android.
[asan] Don't use sysconf(_SC_PAGESIZE) on Android.

This is broken in the current (post-MNC) master branch.
Use EXEC_PAGESIZE instead, the same as on x86 Linux.

This change fixes startup crashes in the existing tests on AOSP
master.

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@258706 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt