Format gd/common with new clang-format

find common -regex '.*\.\(cc\|h\|tpp\)' -exec clang-format -style=file -i {} \;

Test: cert/run --host
Bug: 156858180
Tag: #gd-refactor
Change-Id: I67d1ed149e06aa74d62a1904037c95f52ceaa90c