llvm: Export CMAKE_GDB during configuration.

Appears that llvm was forgotten when other toolchains
got their CMAKE_GDB export.

Signed-off-by: Jaagup Averin <[email protected]>

Author: JaagupAverin

cmake/bintools/llvm/target.cmake

@@ -32,5 +32,7 @@ find_program(CMAKE_READELF NAMES
                            readelf
                            ${find_program_binutils_args})
 
+find_program(CMAKE_GDB     gdb  PATHS ${find_program_binutils_args})
+
 # Use the gnu binutil abstraction
 include(${ZEPHYR_BASE}/cmake/bintools/llvm/target_bintools.cmake)