Detect uuid libs

# Universally Unique Identifier
PKG_CHECK_MODULES(e2fsprogs_uuid, [uuid >= 1.36], [
  AC_DEFINE(USE_E2FSPROGS_UUID, [1], [Define to 1 if you have the e2fsprogs implementation of the UUID generator.])
  AC_SUBST([uuid_CFLAGS], [$e2fsprogs_uuid_CFLAGS])
  AC_SUBST([uuid_LIBS], [$e2fsprogs_uuid_LIBS])
], [
  PKG_CHECK_MODULES(ossp_uuid, [ossp-uuid >= 1.5], [
    AC_DEFINE(USE_OSSP_UUID, [1], [Define to 1 if you have the OSSP implementation of the UUID generator.])
    AC_SUBST([uuid_CFLAGS], [$ossp_uuid_CFLAGS])
    AC_SUBST([uuid_LIBS], [$ossp_uuid_LIBS])
  ], [
    AC_MSG_ERROR(dnl
[Your system doesn't have a suitable UUID generator library.

Download and install either one of these two packages:

e2fsprogs >= 1.36
ossp-uuid >= 1.5
])
  ])
])