As of now, llvm-objcopy silently ignores a provided regex if it doesn't
compile.
This patch adds returning an error saying that a regex couldn't be
compiled, along with the compilation error message.
---------
Co-authored-by: James Henderson <46713263+jh7370@users.noreply.github.com>
While moving objcopy into separate library(D88827), NameOrPattern::create()
was mistakenly placed into ObjcopyOptions.cpp. This patch moves
the NameOrPattern::create() into CommonConfig.h. Additionally it adds
test for using NameOrPattern.
Differential Revision: https://reviews.llvm.org/D121005
