include: Add SHGetImageList and its flags to shellapi.h.

include/shellapi.h

@@ -145,6 +145,19 @@ DWORD_PTR	WINAPI SHGetFileInfoW(LPCWSTR,DWORD,SHFILEINFOW*,UINT,UINT);
 #define  SHGetFileInfo WINELIB_NAME_AW(SHGetFileInfo)
 
 /******************************************
+ * SHGetImageList
+ */
+
+HRESULT WINAPI SHGetImageList(INT, REFIID, void **);
+
+#define SHIL_LARGE        0x0
+#define SHIL_SMALL        0x1
+#define SHIL_EXTRALARGE   0x2
+#define SHIL_SYSSMALL     0x3
+#define SHIL_JUMBO        0x4
+#define SHIL_LAST         SHIL_JUMBO
+
+/******************************************
  * SHSetFileInfo
  */