fix: add link_directories for tesseract/leptonica on macOS

pkg_check_modules provides library names without paths.
Without link_directories, the linker cannot find tesseract
and leptonica on systems where they are not in default
search paths (e.g. Homebrew on macOS arm64).

Author: Dhanush Varma

src/CMakeLists.txt

@@ -202,7 +202,9 @@ if (PKG_CONFIG_FOUND AND WITH_OCR)
   pkg_check_modules (LEPTONICA REQUIRED lept)
 
   set (EXTRA_LIBS ${EXTRA_LIBS} ${TESSERACT_LIBRARIES})
+  link_directories(${TESSERACT_LIBRARY_DIRS})
   set (EXTRA_LIBS ${EXTRA_LIBS} ${LEPTONICA_LIBRARIES})
+  link_directories(${LEPTONICA_LIBRARY_DIRS})
 
   set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DENABLE_OCR")
 endif (PKG_CONFIG_FOUND AND WITH_OCR)
@@ -237,7 +239,9 @@ if (PKG_CONFIG_FOUND AND WITH_HARDSUBX)
   pkg_check_modules (LEPTONICA REQUIRED lept)
 
   set (EXTRA_LIBS ${EXTRA_LIBS} ${TESSERACT_LIBRARIES})
+  link_directories(${TESSERACT_LIBRARY_DIRS})
   set (EXTRA_LIBS ${EXTRA_LIBS} ${LEPTONICA_LIBRARIES})
+  link_directories(${LEPTONICA_LIBRARY_DIRS})
 
   set (EXTRA_INCLUDES ${EXTRA_INCLUDES} ${TESSERACT_INCLUDE_DIRS})
   set (EXTRA_INCLUDES ${EXTRA_INCLUDES} ${LEPTONICA_INCLUDE_DIRS})