OTX: Add brew boost to OTX macos install script

Author: manongjohn

ci-scripts/osx/otx-install.sh

@@ -2,7 +2,7 @@
 brew update
 # from Homebrew 1.6.0 the old formula for obtaining Qt5.9.2 becomes invalid.
 # so we start to use the latest version of Qt. (#1910)
-brew install qt clang-format glew lz4 lzo libusb libmypaint jpeg-turbo nasm yasm aom dav1d fontconfig freetype gnutls lame libass libbluray libsoxr libvorbis libvpx opencore-amr openh264 openjpeg opus rav1e sdl2 snappy speex tesseract theora webp xvid xz
+brew install boost qt clang-format glew lz4 lzo libusb libmypaint jpeg-turbo nasm yasm aom dav1d fontconfig freetype gnutls lame libass libbluray libsoxr libvorbis libvpx opencore-amr openh264 openjpeg opus rav1e sdl2 snappy speex tesseract theora webp xvid xz
 # delete older qt versions and make sure to have only the latest
 brew cleanup qt
 # temp workaround to brew installed glew cmake info overriding glew lib detection