Add support for Samsung and Motorola devices.

Also update the linux code. Some devices have more complex USB descriptors
which can't be parsed with the simple assumption of just skipping the
endpoint descriptors.

adb/usb_linux.c

@@ -318,9 +318,13 @@ static int find_usb_device(const char *base,
                     found_device = 1;
                     break;
                 } else {
-                        // skip to next interface
-                    bufptr += (interface->bNumEndpoints * USB_DT_ENDPOINT_SIZE);
-                }
+                    // seek next interface descriptor
+                    if (i < interfaces - 1) {
+                        while (bufptr[1] != USB_DT_INTERFACE) {
+                            bufptr += bufptr[0];
+                        }
+                    }
+                 }
             } // end of for
 
             adb_close(fd);

adb/usb_vendors.c

@@ -39,11 +39,17 @@
 #define VENDOR_ID_GOOGLE        0x18d1
 // HTC's USB Vendor ID
 #define VENDOR_ID_HTC           0x0bb4
+// Samsung's USB Vendor ID
+#define VENDOR_ID_SAMSUNG       0x04e8
+// Motorola's USB Vendor ID
+#define VENDOR_ID_MOTOROLA      0x22b8
 
 /** built-in vendor list */
 int builtInVendorIds[] = {
     VENDOR_ID_GOOGLE,
     VENDOR_ID_HTC,
+    VENDOR_ID_SAMSUNG,
+    VENDOR_ID_MOTOROLA,
 };
 
 #define BUILT_IN_VENDOR_COUNT    (sizeof(builtInVendorIds)/sizeof(builtInVendorIds[0]))