Removing patches and adding to gitignore

.gitignore

hpvm/llvm_patches/include/Bitcode/LLVMBitCodes.h.patch

hpvm/llvm_patches/include/IR/Attributes.td.patch

hpvm/llvm_patches/include/IR/Intrinsics.td.patch

hpvm/llvm_patches/include/IR/IntrinsicsVISC.td.patch

hpvm/llvm_patches/include/Support/Debug.h.patch

hpvm/llvm_patches/lib/AsmParser/LLLexer.cpp.patch

hpvm/llvm_patches/lib/AsmParser/LLLexer.h.patch

hpvm/llvm_patches/lib/AsmParser/LLParser.cpp.patch

hpvm/llvm_patches/lib/AsmParser/LLParser.h.patch

hpvm/llvm_patches/lib/AsmParser/LLToken.h.patch

hpvm/llvm_patches/lib/Bitcode/Reader/BitcodeReader.cpp.patch

hpvm/llvm_patches/lib/Bitcode/Writer/BitcodeWriter.cpp.patch

hpvm/llvm_patches/lib/IR/Attributes.cpp.patch