Build: Don't use COMPONENT w/install(INCLUDES ...)

(Regression introduced by 24e09baaf024e71841a92d30d0e763242ed959ef)

The install() INCLUDES option is not an artifact option.  It specifies
a list of directories that will be added to the
INTERFACE_INCLUDE_DIRECTORIES target property when the target is
exported using the install() EXPORT option, which occurs when CMake
package config files are generated.  Specifying 'COMPONENT include' with
the install() INCLUDES option caused the INTERFACE_INCLUDE_DIRECTORIES
properties in our CMake package config files to contain
'${_IMPORT_PREFIX}/COMPONENT', which caused errors of the form 'Imported
target "libjpeg-turbo::XXXX" includes non-existent path' when downstream
build systems attempted to include libjpeg-turbo using find_package().

Fixes #759
Closes #760
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 36c36fe..ff9c9c2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1726,7 +1726,7 @@
 if(WITH_TURBOJPEG)
   if(ENABLE_SHARED)
     install(TARGETS turbojpeg EXPORT ${CMAKE_PROJECT_NAME}Targets
-      INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR} COMPONENT include
+      INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
       ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT lib
       LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT lib
       RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT bin)
@@ -1740,7 +1740,7 @@
   endif()
   if(ENABLE_STATIC)
     install(TARGETS turbojpeg-static EXPORT ${CMAKE_PROJECT_NAME}Targets
-      INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR} COMPONENT include
+      INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
       ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT lib)
     if(NOT ENABLE_SHARED)
       if(GENERATOR_IS_MULTI_CONFIG)
@@ -1758,7 +1758,7 @@
 
 if(ENABLE_STATIC)
   install(TARGETS jpeg-static EXPORT ${CMAKE_PROJECT_NAME}Targets
-    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR} COMPONENT include
+    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT lib)
   if(NOT ENABLE_SHARED)
     if(GENERATOR_IS_MULTI_CONFIG)
diff --git a/sharedlib/CMakeLists.txt b/sharedlib/CMakeLists.txt
index 2707710..eaed9e9 100644
--- a/sharedlib/CMakeLists.txt
+++ b/sharedlib/CMakeLists.txt
@@ -119,7 +119,7 @@
 target_link_libraries(jcstest jpeg)
 
 install(TARGETS jpeg EXPORT ${CMAKE_PROJECT_NAME}Targets
-  INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR} COMPONENT include
+  INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
   ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT lib
   LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT lib
   RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT bin)