Fix the build on ppc

... and sync xulrunner-24.0-jemalloc-ppc.patch with firefox.

mozjs52.spec

@@ -1,5 +1,10 @@
 %global major 52
 
+# Require libatomic for ppc
+%ifarch ppc
+%global system_libatomic 1
+%endif
+
 # Big endian platforms
 %ifarch ppc ppc64 s390 s390x
 %global big_endian 1
@@ -36,6 +41,9 @@ BuildRequires:  pkgconfig(zlib)
 BuildRequires:  python2-devel
 BuildRequires:  readline-devel
 BuildRequires:  /usr/bin/zip
+%if 0%{?system_libatomic}
+BuildRequires:  libatomic
+%endif
 
 # Firefox does not allow to build with system version of jemalloc
 Provides: bundled(jemalloc) = 4.3.1
@@ -134,7 +142,7 @@ ln -s libmozjs-%{major}.so.0 %{buildroot}%{_libdir}/libmozjs-%{major}.so
 %check
 # Run SpiderMonkey tests
 %{__python2} tests/jstests.py -d -s -t 1800 --no-progress ../../js/src/js/src/shell/js \
-%ifnarch s390 s390x %{power64}
+%ifarch %{ix86} x86_64 %{arm} aarch64
 ;
 %else
 || :
@@ -142,7 +150,7 @@ ln -s libmozjs-%{major}.so.0 %{buildroot}%{_libdir}/libmozjs-%{major}.so
 
 # Run basic JIT tests
 %{__python2} jit-test/jit_test.py -s -t 1800 --no-progress ../../js/src/js/src/shell/js basic \
-%ifnarch s390 s390x
+%ifarch %{ix86} x86_64 %{arm} aarch64 %{power64}
 ;
 %else
 || :
@@ -163,6 +171,7 @@ ln -s libmozjs-%{major}.so.0 %{buildroot}%{_libdir}/libmozjs-%{major}.so
 %changelog
 * Fri May 11 2018 Kalev Lember <klember@redhat.com> - 52.8.0-1
 - Update to 52.8.0
+- Fix the build on ppc
 
 * Sat Apr 07 2018 Kalev Lember <klember@redhat.com> - 52.7.3-1
 - Update to 52.7.3

xulrunner-24.0-jemalloc-ppc.patch

@@ -1,12 +1,12 @@
-diff -up firefox-48.0/memory/mozjemalloc/jemalloc.c.jemalloc-ppc firefox-48.0/memory/mozjemalloc/jemalloc.c
---- firefox-48.0/memory/mozjemalloc/jemalloc.c.jemalloc-ppc	2016-07-26 10:51:46.385434384 +0200
-+++ firefox-48.0/memory/mozjemalloc/jemalloc.c	2016-07-26 10:53:49.061023106 +0200
-@@ -1090,7 +1090,7 @@ static const bool config_recycle = false
+diff -up mozilla-aurora/memory/mozjemalloc/jemalloc.c.jemalloc-ppc.patch mozilla-aurora/memory/mozjemalloc/jemalloc.c
+--- mozilla-aurora/memory/mozjemalloc/jemalloc.c.jemalloc-ppc.patch	2016-11-18 08:56:32.242742746 +0100
++++ mozilla-aurora/memory/mozjemalloc/jemalloc.c	2016-11-18 08:59:51.809071876 +0100
+@@ -1096,7 +1096,7 @@ static const bool config_recycle = false
   * controlling the malloc behavior are defined as compile-time constants
   * for best performance and cannot be altered at runtime.
   */
 -#if !defined(__ia64__) && !defined(__sparc__) && !defined(__mips__) && !defined(__aarch64__)
-+#if !defined(__ia64__) && !defined(__sparc__) && !defined(__mips__) && !defined(__aarch64__) && !(defined(__powerpc__))
++#if !defined(__ia64__) && !defined(__sparc__) && !defined(__mips__) && !defined(__aarch64__) && !defined(__powerpc__)
  #define MALLOC_STATIC_SIZES 1
  #endif