[PATCH] cmake: Remove check for files not in build list.

[Chandler Carruth]

Please commit with the condition rewritten as suggested or something similar (provided that you test it works, I didn't try out my cmake scribble here).

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Comment at: cmake/modules/LLVMProcessSources.cmake:66
@@ +65,3 @@
+    string(SUBSTRING ${fn} 0 1 first_char)
+    if(NOT ${first_char} STREQUAL ".")
+      list(FIND LLVM_OPTIONAL_SOURCES ${fn} idx)
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While regexs are a bit heavy handed, i think this is simpler as:

  if (NOT "${fn}" MATCHES "^\.")

Otherwise, this looks fine.

http://reviews.llvm.org/D4581