Upgrade M4 third-party source code

A while back I discovered issues with M4 third-party
package and reported it to M4 folks.   Fixes were
made in the m4-1.4.19 package version. These
changes remove the patches and picks up the latest
version of M4 with the fixes.

.gitignore

@@ -32,8 +32,8 @@
 /third-party/json-c-0.13.1/
 /third-party/openssl-1.1.1k.tar.gz
 /third-party/openssl-1.1.1k
-/third-party/m4-1.4.18.tar.xz
-/third-party/m4-1.4.18/
+/third-party/m4-1.4.19.tar.xz
+/third-party/m4-1.4.19/
 /third-party/tarballs
 /third-party/tree/
 /src/rhts-report-result

restraint.spec

@@ -35,7 +35,7 @@ Source111:      libsoup-2.52.2.tar.xz
 Source112:      json-c-0.13.1.tar.gz
 Source114:      openssl-1.1.1k.tar.gz
 Source115:      autoconf-2.69.tar.gz
-Source116:      m4-1.4.18.tar.xz
+Source116:      m4-1.4.19.tar.xz
 %endif
 
 BuildRoot:	%(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
@@ -170,7 +170,6 @@ export CFLAGS="$RPM_OPT_FLAGS -march=i486"
 %if 0%{?with_static:1}
 pushd third-party
 %if ( 0%{?fedora} && 0%{?fedora} < 35 ) || ( 0%{?rhel} && 0%{?rhel} < 9 )
-rm m4-1.4.18-glibc-sigstksz.patch
 rm glib_new_close_range_arg.patch
 %endif
 %if 0%{?fedora} || 0%{?rhel} >= 8

third-party/Makefile

@@ -13,7 +13,7 @@ SQLITE = sqlite-autoconf-3310100
 INTLTOOL = intltool-0.51.0
 LIBJSONC = json-c-0.13.1
 AUTOCONF = autoconf-2.69
-M4 = m4-1.4.18
+M4 = m4-1.4.19
 
 arch := $(shell uname -m)
 
@@ -258,10 +258,6 @@ $(AUTOCONF)/.patches-done: $(AUTOCONF)
 	touch $@
 
 $(M4)/.patches-done: $(M4)
-	patch -d$(M4) -p1 < m4-1.4.18-glibc-change-work-around.patch
-	if [ -e m4-1.4.18-glibc-sigstksz.patch ]; then\
-		patch -d$(M4) -p1 < m4-1.4.18-glibc-sigstksz.patch;\
-	fi
 	touch $@
 
 .PHONY: clean