Change OptionValueFileSpec::SetValueFromCString to strip off whitespace, single-quote and double-quotemarks from around file paths specified to settings like target.expr-prefix or target.process.python-os-plugin-path. <rdar://problem/14970457> 
Change OptionValueFileSpec::SetValueFromCString to strip off whitespace,
single-quote and double-quotemarks from around file paths specified to
settings like target.expr-prefix or target.process.python-os-plugin-path.
<rdar://problem/14970457> 


git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@190654 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb