Add file FileInfo factory applys without io

It may be the case that the file property is already known and we can
avoid performing additional io by just passing in the value directly.

util-cache/src/main/scala/sbt/util/FileInfo.scala

@@ -90,6 +90,8 @@ object FileInfo {
 
     implicit def apply(file: File): HashModifiedFileInfo =
       FileHashModified(file.getAbsoluteFile, Hash(file).toList, IO.getModifiedTimeOrZero(file))
+    def apply(file: File, hash: List[Byte], lastModified: Long): HashModifiedFileInfo =
+      FileHashModified(file.getAbsoluteFile, hash, lastModified)
   }
 
   object hash extends Style {
@@ -115,6 +117,8 @@ object FileInfo {
     }
 
     implicit def apply(file: File): HashFileInfo = FileHash(file.getAbsoluteFile, computeHash(file))
+    def apply(file: File, bytes: List[Byte]): HashFileInfo =
+      FileHash(file.getAbsoluteFile, bytes)
 
     private def computeHash(file: File): List[Byte] =
       try Hash(file).toList
@@ -147,6 +151,8 @@ object FileInfo {
 
     implicit def apply(file: File): ModifiedFileInfo =
       FileModified(file.getAbsoluteFile, IO.getModifiedTimeOrZero(file))
+    def apply(file: File, lastModified: Long): ModifiedFileInfo =
+      FileModified(file.getAbsoluteFile, lastModified)
   }
 
   object exists extends Style {
@@ -175,5 +181,9 @@ object FileInfo {
       val abs = file.getAbsoluteFile
       PlainFile(abs, abs.exists)
     }
+    def apply(file: File, exists: Boolean): PlainFileInfo = {
+      val abs = file.getAbsoluteFile
+      PlainFile(abs, exists)
+    }
   }
 }