make sure ngraph name is correct (#1157)

src/ngraph/CMakeLists.txt

@@ -183,7 +183,7 @@ target_link_libraries(ngraph PUBLIC libjson)
 if (NOT APPLE)
     set_property(TARGET ngraph APPEND_STRING PROPERTY LINK_FLAGS " -Wl,--rpath,$ORIGIN")
 
-    # NGraph links against one or more libraries (ex. LLVM) but we don't want to
+    # nGraph links against one or more libraries (ex. LLVM) but we don't want to
     # export these symbols as part of the DSO. This is a GNU ld (and derivatives) specific
     # option so making this portable is still an open issue. As a note for the future,
     # this is not an issue on Windows and LLVM's lld does support --exclude-libs.
@@ -208,7 +208,7 @@ target_link_libraries(ngraph PUBLIC dl pthread)
 # Installation logic...
 #-----------------------------------------------------------------------------------------------
 
-# NGraph
+# nGraph
 install(FILES ${CMAKE_BINARY_DIR}/VERSION DESTINATION ${CMAKE_INSTALL_PREFIX})
 install(TARGETS ngraph DESTINATION ${NGRAPH_INSTALL_LIB})  # libngraph.so
 install(DIRECTORY

src/ngraph/runtime/gpu/gpu_external_function.cpp

@@ -314,7 +314,7 @@ void runtime::gpu::GPU_ExternalFunction::compile()
     codegen::CodeWriter writer;
 
     writer +=
-        R"(// Generated by the NGraph GPU backend
+        R"(// Generated by the nGraph GPU backend
 #include <cublas_v2.h>
 #include <cuda.h>
 #include <cuda_runtime.h>