[CMake] Fixed petsc build on envinf1.

MathLib/CMakeLists.txt

@@ -50,6 +50,7 @@ if (OGS_USE_MKL)
 endif()
 
 if (OGS_USE_PETSC)
+    target_include_directories(MathLib PUBLIC ${PETSC_INCLUDE_DIRS})
     target_link_libraries(MathLib PUBLIC ${PETSC_LIBRARIES})
 endif()
 

cmake-modules @ 75678d1d

-Subproject commit 28c3f6046151f88b338d46e5d3149e89e1bf1d15
+Subproject commit 75678d1d80e39e2e1b14b2fd6afd0e8823e60b2b