Cleanup: fix typos in comments and docs

CMakeLists.txt

GNUmakefile

build_files/build_environment/cmake/harvest.cmake

build_files/build_environment/cmake/options.cmake

build_files/build_environment/cmake/package_python.cmake

build_files/build_environment/install_deps.sh

build_files/cmake/cmake_netbeans_project.py

source/blender/blenfont/intern/blf_font.c

source/blender/blenkernel/BKE_global.h

source/blender/blenkernel/intern/constraint.c

source/blender/blenkernel/intern/dynamicpaint.c

source/blender/blenkernel/intern/fluid.c

source/blender/blenkernel/intern/lib_override.c

source/blender/blenkernel/intern/material.c

source/blender/blenkernel/intern/softbody.c

source/blender/blenkernel/intern/text.c

source/blender/blenlib/intern/BLI_mempool.c

...der/draw/engines/eevee/shaders/ambient_occlusion_lib.glsl

.../blender/draw/engines/eevee/shaders/closure_eval_lib.glsl

...lender/draw/engines/eevee/shaders/common_utiltex_lib.glsl