Re-organize specs to match existing structure

Author: nex3

spec/values/colors/alpha_hex-3.5/error

@@ -1,4 +1,4 @@
-DEPRECATION WARNING on line 6, column 15 of /sass/spec/css/color/alpha_hex/deprecation/input.scss: 
+DEPRECATION WARNING on line 6, column 15 of /sass/spec/values/colors/alpha_hex/deprecation/input.scss: 
 The value "#AbCd" is currently parsed as a string, but it will be parsed as a
 color in a release on or after 19 September 2018.
 
@@ -8,7 +8,7 @@ To parse it as a color, use "rgba(170, 187, 204, 0.8666666667)".
   four-digit: #AbCd;
               ^^^^^
 
-DEPRECATION WARNING on line 7, column 16 of /sass/spec/css/color/alpha_hex/deprecation/input.scss: 
+DEPRECATION WARNING on line 7, column 16 of /sass/spec/values/colors/alpha_hex/deprecation/input.scss: 
 The value "#aBcDeFaB" is currently parsed as a string, but it will be parsed as a
 color in a release on or after 19 September 2018.
 
@@ -18,7 +18,7 @@ To parse it as a color, use "rgba(171, 205, 239, 0.6705882353)".
   eight-digit: #aBcDeFaB;
                ^^^^^^^^^
 
-DEPRECATION WARNING on line 8, column 28 of /sass/spec/css/color/alpha_hex/deprecation/input.scss: 
+DEPRECATION WARNING on line 8, column 28 of /sass/spec/values/colors/alpha_hex/deprecation/input.scss: 
 The value "#abcd" is currently parsed as a string, but it will be parsed as a
 color in a release on or after 19 September 2018.
 
@@ -28,7 +28,7 @@ To parse it as a color, use "rgba(170, 187, 204, 0.8666666667)".
   four-digit-type: type-of(#abcd);
                            ^^^^^
 
-DEPRECATION WARNING on line 9, column 29 of /sass/spec/css/color/alpha_hex/deprecation/input.scss: 
+DEPRECATION WARNING on line 9, column 29 of /sass/spec/values/colors/alpha_hex/deprecation/input.scss: 
 The value "#ABCDEFAB" is currently parsed as a string, but it will be parsed as a
 color in a release on or after 19 September 2018.