[clangd] Tune macro quality scoring for code completion.
[clangd] Tune macro quality scoring for code completion.

x0.2 seems to be too much penalty, macros might be wanted in some cases;
changing to 0.5x instead. The tuning didn't affect ranking for non-macro
completions.

git-svn-id: a34e9779ed74578ad5922b3306b3d80a0c825546@341449 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra