[docs] Reorder TESTING.md sections

And use --reconfigure where makes sense

TESTING.md

@@ -1,48 +1,46 @@
-## Build & Run
+## Build and Test
+
+```shell
+meson build
+ninja -Cbuild
+meson test -Cbuild
+```
+
+### Debug with GDB
+
+```shell
+meson test -Cbuild --gdb testname
+```
+
+## Build and Run
 
 Depending on what area you are working in change or add `HB_DEBUG_<whatever>`.
 Values defined in `hb-debug.hh`.
 
 ```shell
-CPPFLAGS='-DHB_DEBUG_SUBSET=100' meson setup build
+CPPFLAGS='-DHB_DEBUG_SUBSET=100' meson setup build --reconfigure
 meson test -C build
 ```
 
 ### Run tests with asan
 
 ```shell
-meson setup build -Db_sanitize=address
+meson setup build -Db_sanitize=address --reconfigure
 meson compile -C build
 meson test -C build
 ```
 
-### Debug with GDB
-
-```
-meson setup build
-meson compile -C build
-meson test -C build --gdb testname
-```
-
 ### Enable Debug Logging
 
 ```shell
-CPPFLAGS=-DHB_DEBUG_SUBSET=100 meson build
+CPPFLAGS=-DHB_DEBUG_SUBSET=100 meson build --reconfigure
 ninja -C build
 ```
 
-## Build and Test
-
-```shell
-meson build
-ninja -Cbuild
-meson test -Cbuild
-```
-
 ## Test with the Fuzzer
 
 ```shell
-CXXFLAGS="-fsanitize=address,fuzzer-no-link" meson build --default-library=static -Dfuzzer_ldflags="-fsanitize=address,fuzzer" -Dexperimental_api=true
+CXXFLAGS="-fsanitize=address,fuzzer-no-link" meson build --default-library=static -Dfuzzer_ldflags="-fsanitize=address,fuzzer" -Dexperimental_api=true --reconfigure
 ninja -C build test/fuzzing/hb-{shape,draw,subset,set}-fuzzer
 build/test/fuzzing/hb-subset-fuzzer
 ```
@@ -50,7 +48,7 @@ build/test/fuzzing/hb-subset-fuzzer
 ## Profiling
 
 ```
-meson build
+meson build --reconfigure
 meson compile -C build
 build/perf/perf
 ```