Fix local cpp tests after inplace build (#911)

Add top level path to search for .so in test build
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

tests/cpp/CMakeLists.txt

@@ -26,7 +26,7 @@ if(NOT DEFINED TE_LIB_PATH)
                     OUTPUT_VARIABLE TE_LIB_PATH)
 endif()
 
-find_library(TE_LIB NAMES transformer_engine PATHS "${TE_LIB_PATH}/transformer_engine" ENV TE_LIB_PATH REQUIRED)
+find_library(TE_LIB NAMES transformer_engine PATHS "${TE_LIB_PATH}/transformer_engine" ${TE_LIB_PATH} ENV TE_LIB_PATH REQUIRED)
 
 message(STATUS "Found transformer_engine library: ${TE_LIB}")
 include_directories(../../transformer_engine/common/include)