Beef up testing in tools/*

- Build and run all tools, including glfw, on Mac and Windows as well.
- Consolidate tests that don't need to be in a downstream repo into the
  tools/test directory.
- Change the build output directory to "out/debug/<executable>" to avoid
  tab completion to "builtin" when trying to access the "build"
  directory.
- Update the Mac Skia built to support GLES so we can run ANGLE.

Diffs=
75a6b74b8 Beef up testing in tools/*

.rive_head

diff --git a/.rive_head b/.rive_head
index 72a2472..ca68571 100644
--- a/.rive_head
+++ b/.rive_head
@@ -1 +1 @@
-79f98695a664d4630b757572a4aa260e3ba8d5cf
+75a6b74b86fff27165430a4bce8ec3ca09a1c69b

skia/dependencies/make_skia.sh

diff --git a/skia/dependencies/make_skia.sh b/skia/dependencies/make_skia.sh
index ea2109f..05891ee 100755
--- a/skia/dependencies/make_skia.sh
+++ b/skia/dependencies/make_skia.sh
@@ -2,6 +2,7 @@
 
 set -e
 
+export MAKE_SKIA_FILE=make_skia.sh
 ./get_skia.sh
 
 # use Rive optimized/stripped Skia for iOS static libs.
@@ -256,6 +257,7 @@
     skia_enable_skottie=false \
     skia_enable_tools=false \
     skia_enable_skgpu_v2=false \
+    skia_gl_standard = \"\" \
     "
 ninja -C out/static
 du -hs out/static/libskia.a

skia/dependencies/make_skia_recorder.sh

diff --git a/skia/dependencies/make_skia_recorder.sh b/skia/dependencies/make_skia_recorder.sh
index 0cd348b..22c036e 100755
--- a/skia/dependencies/make_skia_recorder.sh
+++ b/skia/dependencies/make_skia_recorder.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 set -ex
 
+export MAKE_SKIA_FILE=make_skia_recorder.sh
 source ./get_skia2.sh
 source ./cache_helper.sh
 
@@ -52,6 +53,7 @@
         skia_enable_tools = false \
         skia_enable_skgpu_v1 = true \
         skia_enable_skgpu_v2 = false \
+        skia_gl_standard = \"\" \
         "
     ninja -C out/static
 
@@ -68,4 +70,4 @@
         build_skia_recorder
         OUTPUT_CACHE=out upload_cache
     fi 
-fi
\ No newline at end of file
+fi