We provide a pcre formula as OS X does not provide libpcre headers.
However, it does provide the library itself and so occasionally things
will use Homebrew's pcre headers and link against the system library.
This should be avoided to prevent incompatibilities, so explicitly tell
the build system where to look for the library where necessary.
Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Remove obsolete utfcpp sub-formula for ledger head builds,
since it's now being referenced as a git submodule.
Signed-off-by: Adam Vandenberg <flangy@gmail.com>
