Add some specifiers for build types to CMake lines

Author: starseeker

NOTES.md

@@ -559,7 +559,7 @@ optional third party components:
 
 ```
 geogram (RELEASE)$ mkdir build && cd build
-build (RELEASE)$ cmake ..  -DGEOGRAM_LIB_ONLY=ON -DGEOGRAM_WITH_GRAPHICS=OFF -DGEOGRAM_WITH_LUA=OFF -DGEOGRAM_WITH_HLBFGS=OFF -DGEOGRAM_WITH_TETGEN=OFF -DGEOGRAM_WITH_TRIANGLE=OFF
+build (RELEASE)$ cmake ..  -DGEOGRAM_LIB_ONLY=ON -DGEOGRAM_WITH_GRAPHICS=OFF -DGEOGRAM_WITH_LUA=OFF -DGEOGRAM_WITH_HLBFGS=OFF -DGEOGRAM_WITH_TETGEN=OFF -DGEOGRAM_WITH_TRIANGLE=OFF -DCMAKE_BUILD_TYPE=Release
 CMake Deprecation Warning at CMakeLists.txt:5 (cmake_minimum_required):
   Compatibility with CMake < 3.5 will be removed from a future version of
   CMake.
@@ -742,7 +742,7 @@ so we run make with the GEOGRAM_BLD target.
 ```
 bext (main) $ cp -r ~/geogram geogram/
 bext (main) $ mkdir build && cd build
-build (main) $ cmake .. -DENABLE_ALL=ON
+build (main) $ cmake .. -DENABLE_ALL=ON -DCMAKE_BUILD_TYPE=Release
 build (main) $ make GEOGRAM_BLD
 [  0%] Creating directories for 'PATCH_BLD'
 [  0%] No download step for 'PATCH_BLD'

README.md

@@ -15,7 +15,7 @@ mkdir bext_build && cd bext_build
 ```
 * Configure with CMake.  Individual components can be enabled or disabled, but the ENABLE_ALL flag is used to automatically turn on all the projects.  There are also USE_* variables that can enable or disable various groupings of components based on which specific application stacks the user wishes to support.
 ```sh
-cmake ../bext -DENABLE_ALL=ON
+cmake ../bext -DENABLE_ALL=ON -DCMAKE_BUILD_TYPE=Release
 ```
 * Run the build process.
 ```sh
@@ -61,7 +61,7 @@ cd .. && mkdir brlcad_exttest_build && cd brlcad_exttest_build
 ```
 * Configure with CMake, specifying the path holding the bext output directory the BRLCAD_EXT_DIR variable to locate bext_output. Unless you have overridden the CMAKE_INSTALL_PREFIX of the bext build, it will be located in your home directory.  The bext_output directory should in turn contain install and noinstall folders.  If you also wish to test with Qt, you must currently enable that support in BRL-CAD as well.  (Note that the BRL-CAD configure process is responsible for staging the BRLCAD_EXT_DIR contents into the build directory, so it can take some time to complete...)
 ```sh
-cmake ../brlcad -DBRLCAD_EXT_DIR=<your_bext_install_dir>/bext_output -DBRLCAD_ENABLE_QT=ON
+cmake ../brlcad -DBRLCAD_EXT_DIR=<your_bext_install_dir>/bext_output -DBRLCAD_ENABLE_QT=ON -DCMAKE_BUILD_TYPE=Release
 ```
 * Run the build process.
 ```sh