[Bultin][ARM] Make aeabi_uldivmod and aeabi_ldivmod be Thumb1 compatible

Summary:
in aeabi_ldivmod and uldivmod, using r6 instead of r12 as the temp reg due to limitation of Thumb1 ISA.
Now, all EABI sources are Thumb1 compatible.

Also added test cases by reusing the test cases from divmodsi4_test.c, udivmodsi4_test and udivmoddi4_test.c

Reviewers: rengolin, compnerd

Reviewed By: rengolin

Subscribers: javed.absar, aemerson, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D29226

llvm-svn: 293527