Merge branch 'ldadd-cflags-warnings' of https://github.com/rudimeier/util-linux

Merge branch 'ldadd-cflags-warnings' of https://github.com/rudimeier/util-linux

* 'ldadd-cflags-warnings' of https://github.com/rudimeier/util-linux:
  build-sys: disable unused parameter warnings for some test progs
  misc: fix compiler warnungs (unsigned/signed)
  misc: fix warnings "unused parameter" [-Wunused-parameter]
  libfdisk: fix warnings, "redundant redeclaration" [-Wredundant-decls]
  tests: fix compiler warnings [-Wmissing-prototypes]
  libfdisk: fix compiler warnings [-Wmissing-prototypes]
  libfdisk: fix missing symbol
  libblkid: fix compiler warnings [-Wmissing-prototypes]
  libmount: add mnt_fs_set_priority()
  build-sys: always add AM_CFLAGS
  build-sys: always use global LDADD