Fix shared library link error with cmake on Windows

Set the library path as the current binary dir

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index ddede03..914f98e 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -259,6 +259,7 @@
 endif(USE_STATIC_MBEDTLS_LIBRARY)
 
 if(USE_SHARED_MBEDTLS_LIBRARY)
+    set(CMAKE_LIBRARY_PATH ${CMAKE_CURRENT_BINARY_DIR})
     add_library(${mbedcrypto_target} SHARED ${src_crypto})
     set_target_properties(${mbedcrypto_target} PROPERTIES VERSION 3.1.0 SOVERSION 11)
     target_link_libraries(${mbedcrypto_target} PUBLIC ${libs})