feat(flatpak): ship the SPIRV-Tools programs

Crafter.Graphics' PushConstantRewrite and UIFusedShader tests require
tool:spirv-val, and the Sdk has no spirv-val, so inside the Flatpak they
are skipped. The spirv-tools module the validation layer needs built
only the libraries, and removed them afterwards.

It now builds the programs as well, spirv-val, spirv-opt, spirv-dis and
the rest, which link SPIRV-Tools statically, and ships them. The
headers, the static libraries, the CMake and pkg-config files and
libSPIRV-Tools-shared.so, which nothing here links, are still removed,
and a post-install step runs spirv-val --version.

packaging/flatpak/net.catcrafts.CrafterBuild.yaml

@@ -11,8 +11,9 @@
 #
 # Programs that `-r` and the test runner start run in this sandbox, so the
 # tools to debug them live here too: lldb (above), the Sdk's gdb, valgrind
-# and strace, and the Khronos Vulkan validation layers, GPU-assisted
-# validation included, which neither the Sdk nor its GL extensions carry.
+# and strace, the Khronos Vulkan validation layers, GPU-assisted validation
+# included, which neither the Sdk nor its GL extensions carry, and the
+# SPIRV-Tools programs such as spirv-val.
 app-id: net.catcrafts.CrafterBuild
 runtime: org.freedesktop.Sdk
 runtime-version: '26.08'
@@ -270,7 +271,7 @@ modules:
   # move the layers to the SDK release of that loader and take the other
   # four revisions from its known_good.json again. The four are built into
   # /app at those revisions rather than taken from the Sdk, whose versions
-  # follow the runtime, and none of them ships.
+  # follow the runtime, and of them only SPIRV-Tools' programs ship.
   - name: vulkan-headers
     buildsystem: cmake-ninja
     builddir: true
@@ -308,20 +309,32 @@ modules:
 
   - name: spirv-tools
     # The optimizer GPU-assisted validation instruments shaders with, linked
-    # into the layer statically.
+    # into the layer statically, and SPIRV-Tools' programs (spirv-val,
+    # spirv-opt, spirv-dis and the rest), which ship: a program or test that
+    # checks its SPIR-V with spirv-val, as Crafter.Graphics' do, finds it in
+    # the sandbox. The libraries and headers stay build-only.
     buildsystem: cmake-ninja
     builddir: true
     build-options:
       no-debuginfo: true
+      strip: true
     config-opts:
       - -DCMAKE_BUILD_TYPE=Release
       # The installed SPIRV-Headers: its include/ holds the grammar files
       # SPIRV-Tools generates its tables from, as the source tree does.
       - -DSPIRV-Headers_SOURCE_DIR=/app
-      - -DSPIRV_SKIP_EXECUTABLES=ON
+      - -DSPIRV_SKIP_TESTS=ON
       - -DSPIRV_WERROR=OFF
     cleanup:
-      - '*'
+      - /include/spirv-tools
+      - /lib/libSPIRV-Tools*.a
+      # Always built besides the static libraries, and linked by nothing
+      # here: the programs and the layer take SPIRV-Tools statically.
+      - /lib/libSPIRV-Tools-shared.so
+      - /lib/cmake/SPIRV-Tools*
+      - /lib/pkgconfig/SPIRV-Tools*
+    post-install:
+      - spirv-val --version
     sources:
       - type: archive
         url: https://github.com/KhronosGroup/SPIRV-Tools/archive/b707790a898e44038547df54580022fc1cf89c3d.tar.gz