[Tooling] Fix warnings
This patch fixes:
clang/lib/Tooling/DependencyScanning/InProcessModuleCache.cpp:69:7:
error: 'std::lock_guard' may not intend to support class template
argument deduction [-Werror,-Wctad-maybe-unsupported]
clang/lib/Tooling/DependencyScanning/InProcessModuleCache.cpp:80:7:
error: 'std::lock_guard' may not intend to support class template
argument deduction [-Werror,-Wctad-maybe-unsupported]
clang/lib/Tooling/DependencyScanning/InProcessModuleCache.cpp:93:7:
error: 'std::lock_guard' may not intend to support class template
argument deduction [-Werror,-Wctad-maybe-unsupported]
