[flang][cmake] Fix bcc dependencies (#125822)

The Fortran libraries are not part of MLIR, so they should use
target_link_libraries() rather than mlir_target_link_libraries().

This fixes an issue introduced in
#120966.

(cherry picked from commit f9af5c1)

Author: nikic

flang/tools/bbc/CMakeLists.txt

@@ -29,16 +29,16 @@ target_link_libraries(bbc PRIVATE
   flangFrontend
   flangPasses
   FlangOpenMPTransforms
+  FortranCommon
+  FortranParser
+  FortranEvaluate
+  FortranSemantics
+  FortranLower
 )
 
 mlir_target_link_libraries(bbc PRIVATE
   ${dialect_libs}
   ${extension_libs}
   MLIRAffineToStandard
   MLIRSCFToControlFlow
-  FortranCommon
-  FortranParser
-  FortranEvaluate
-  FortranSemantics
-  FortranLower
 )