print/ghostscript9-agpl-base: Fix build on armv7

The bundled version of tesseract requires the <asm/hwcap.h> header
to detect the availability of NEON instructions on armv7.  This
issue has already been reported to up stream.

Reported upstream:	tesseract-ocr/tesseract#3782

PR:		263003
Approved by:	portmgr (build fix blanket)

print/ghostscript9-agpl-base/files/patch-tesseract_src_arch_simddetect.cpp

@@ -0,0 +1,34 @@
+--- tesseract/src/arch/simddetect.cpp.orig	2021-09-27 07:44:02 UTC
++++ tesseract/src/arch/simddetect.cpp
+@@ -40,10 +40,13 @@
+ #if defined(HAVE_NEON) && !defined(__aarch64__)
+ #ifdef ANDROID
+ #include <cpu-features.h>
+-#else
++#elif defined(__linux__)
+ /* Assume linux */
+ #include <sys/auxv.h>
+ #include <asm/hwcap.h>
++#elif defined(__FreeBSD__)
++#include <sys/auxv.h>
++#include <sys/elf.h>
+ #endif
+ #endif
+
+@@ -188,9 +191,15 @@ SIMDDetect::SIMDDetect() {
+       neon_available_ = (android_getCpuFeatures() &
+                          ANDROID_CPU_ARM_FEATURE_NEON);
+   }
+-#else
++#elif defined(__linux__)
+   /* Assume linux */
+   neon_available_ = getauxval(AT_HWCAP) & HWCAP_NEON;
++#elif defined(__FreeBSD__)
++  unsigned long hwcap = 0;
++  elf_aux_info(AT_HWCAP, &hwcap, sizeof hwcap);
++  neon_available_ = hwcap & HWCAP_NEON;
++#else
++  neon_available_ = 0;
+ #endif
+ #endif
+