seamonkey: apply kettenis's fft.asm fix. Also set USE_NOEXECONLY since

the embedded skia does some embedded assembly stuff that is not easy
neuter and makes seamonkey completely broken on PKU machines.

www/seamonkey/Makefile

@@ -1,5 +1,7 @@
 BROKEN-aarch64 =	third_party/rust/libc/src/lib.rs: error[E0412]: cannot find type 'c_long' in this scope
 
+USE_NOEXECONLY =	Yes
+
 COMMENT-main =		Mozilla application suite
 COMMENT-lightning =	Mozilla Seamonkey calendar extension
 ONLY_FOR_ARCHS =	amd64 i386 aarch64
@@ -13,7 +15,7 @@ MULTI_PACKAGES =	-main -lightning
 PKGNAME-main =		${PKGNAME}
 PKGNAME-lightning =	lightning-seamonkey-5.8.15
 EPOCH-lightning =	0
-REVISION-main =		0
+REVISION-main =		1
 
 HOMEPAGE =	https://www.seamonkey-project.org/
 

www/seamonkey/patches/patch-media_ffvpx_libavcodec_x86_fft_asm

@@ -0,0 +1,43 @@
+The x86 assembly FFT implementation uses dispatch tables in .text.  This is
+incompatible with x-only so move them into .data.rel.ro where we can have
+relocations.  But since they are in the RELRO segment they will be made
+read-only by ld.so after relocations have been processed.
+
+Index: media/ffvpx/libavcodec/x86/fft.asm
+--- media/ffvpx/libavcodec/x86/fft.asm.orig
++++ media/ffvpx/libavcodec/x86/fft.asm
+@@ -548,10 +548,6 @@ DEFINE_ARGS zc, w, n, o1, o3
+ %macro FFT_DISPATCH 2; clobbers 5 GPRs, 8 XMMs
+     lea r2, [dispatch_tab%1]
+     mov r2, [r2 + (%2q-2)*gprsize]
+-%ifdef PIC
+-    lea r3, [$$]
+-    add r2, r3
+-%endif
+     call r2
+ %endmacro ; FFT_DISPATCH
+ 
+@@ -731,12 +727,6 @@ DECL_PASS pass_interleave_3dnow, PASS_BIG 0
+ %define pass_interleave_3dnowext pass_interleave_3dnow
+ %endif
+ 
+-%ifdef PIC
+-%define SECTION_REL - $$
+-%else
+-%define SECTION_REL
+-%endif
+-
+ %macro DECL_FFT 1-2 ; nbits, suffix
+ %ifidn %0, 1
+ %xdefine fullsuffix SUFFIX
+@@ -773,8 +763,10 @@ fft %+ n %+ fullsuffix:
+ %endrep
+ %undef n
+ 
++[SECTION .data.rel.ro write]
+ align 8
+ dispatch_tab %+ fullsuffix: pointer list_of_fft
++__?SECT?__
+ %endmacro ; DECL_FFT
+ 
+ %if HAVE_AVX_EXTERNAL