message: fix fPIC for qt5
diff: @@ -336,6 +336,11 @@ if test x$use_glibc_compat != xno; then
  fi
  +if test x$TARGET_OS != xwindows; then
  + # All windows code is PIC, forcing it on just adds useless compile warnings
  + AX_CHECK_COMPILE_FLAG([-fPIC],[PIC_FLAGS="-fPIC"])
  +fi
  +
  if test x$use_hardening != xno; then
  AX_CHECK_COMPILE_FLAG([-Wstack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"])
  AX_CHECK_COMPILE_FLAG([-fPIE],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fPIE"])
  @@ -355,11 +360,6 @@ if test x$use_hardening != xno; then
  # -pie will link successfully with mingw, but it's unsupported and leads to undeterministic binaries
  AX_CHECK_LINK_FLAG([[-pie]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -pie"])
  fi
  -
  - CXXFLAGS="$CXXFLAGS $HARDENED_CXXFLAGS"
  - CPPFLAGS="$CPPFLAGS $HARDENED_CPPFLAGS"
  - LDFLAGS="$LDFLAGS $HARDENED_LDFLAGS"
  - OBJCXXFLAGS="$CXXFLAGS"
  fi
  dnl this flag screws up non-darwin gcc even when the check fails. special-case it.
  @@ -677,6 +677,15 @@ AC_SUBST(CLIENT_VERSION_BUILD, _CLIENT_VERSION_BUILD)
  AC_SUBST(CLIENT_VERSION_IS_RELEASE, _CLIENT_VERSION_IS_RELEASE)
  AC_SUBST(COPYRIGHT_YEAR, _COPYRIGHT_YEAR)
  +AC_SUBST(RELDFLAGS)
  +AC_SUBST(HARDENED_CXXFLAGS)
  +AC_SUBST(HARDENED_CPPFLAGS)
  +AC_SUBST(HARDENED_LDFLAGS)
  +AC_SUBST(CXXFLAGS)
  +AC_SUBST(CPPFLAGS)
  +AC_SUBST(LDFLAGS)
  +AC_SUBST(PIC_FLAGS)
  +AC_SUBST(PIE_FLAGS)
  AC_SUBST(USE_UPNP)
  AC_SUBST(USE_QRCODE)
  