makefile: add a build-chg option
This is done as a gratuitous improvement on the way to add makefile entry to
build and install rhg.
It seems saner to have equivalent entry for chg too.
Differential Revision: https://phab.mercurial-scm.org/D10191
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2