using get_platform() function instead of sys.platform

Author: artenator

scripts/install_solc.py

@@ -359,4 +359,4 @@ def install_solc(platform, identifier):
         print("Invocation error.  Should be invoked as `./install_solc.py <version>`")
         sys.exit(1)
 
-    install_solc(sys.platform, identifier)
+    install_solc(get_platform(), identifier)

solc/install.py

@@ -431,7 +431,7 @@ def install_from_source(identifier):
 
 def install_solc(identifier, platform=None):
     if platform is None:
-        platform = sys.platform
+        platform = get_platform()
 
     if platform not in INSTALL_FUNCTIONS:
         raise ValueError(