[NFC] Set gitattributes for line endings

A clean checkout of LLVM using core.autocrlf=on for Windows cannot pass
the LLVM test suite because several test input files rely on specific
line endings.

This change updates the line ending attributes for impacted tests and
re-normalizes a CRLF test case that was committed as LF to the git
index.

llvm/.gitattributes

@@ -1,20 +1,25 @@
 # binary files
-test/Object/Inputs/*.a-* binary
+test/Object/Inputs/*.a* binary
 test/tools/dsymutil/Inputs/*.o binary
 test/tools/dsymutil/Inputs/*.a binary
 test/tools/dsymutil/Inputs/*.i386 binary
 test/tools/dsymutil/Inputs/*.x86_64 binary
 test/tools/dsymutil/Inputs/*.armv7m binary
 test/tools/dsymutil/Inputs/*.dylib binary
+test/tools/dsymutil/Inputs/*.dSYM binary
+test/tools/dsymutil/Inputs/*.swiftmodule binary
 test/tools/llvm-ar/Inputs/*.lib binary
+test/tools/llvm-ar/Inputs/*.a binary
 test/tools/llvm-objdump/Inputs/*.a binary
 test/tools/llvm-rc/Inputs/* binary
 test/tools/llvm-strings/Inputs/numbers binary
 test/MC/AsmParser/incbin_abcd binary
 test/YAMLParser/spec-09-02.test binary
 
-# These files must have CRLF line endings, therefore git should treat them as
-# binary and not autoconvert line endings (for example, when core.autocrlf is
-# on).
-test/MC/AsmParser/preserve-comments-crlf.s binary
-test/tools/llvm-mca/X86/directives-handle-crlf.s binary
+# These files must have CRLF line endings, therefore git should explicity treat
+# them as always having crlf line endings
+test/MC/AsmParser/preserve-comments-crlf.s text eol=crlf
+test/tools/llvm-mca/X86/directives-handle-crlf.s text eol=crlf
+
+# These files must have LF line endings because the test requires exact matching
+test/tools/llvm-strings/radix.test text eol=lf