Verify exported symbols in java.desktop

As part of JDK-8200178, I was asked to file a bug detailing all "suspicious" code I found related to exported symbols. Here is the list for java.desktop. Note that "suspicious" might just be something I misunderstood, not a definite cause for action.

In libawt:
 * On linux, *all* symbols are exported!
 * The following methods do not have name that makes it clear that they are exported. Is this correct? The symbols are:
   img_makePalette, make_uns_ordered_dither_array, initInverseGrayLut, make_dither_arrays, doFillPath, doDrawPath.
 * The following global variables are exported (exporting global variables is not recommended):
    jvm, g_CMpDataID, colorValueID, std_img_oda_red, img_oda_green, std_img_oda_blue, std_odas_computed, mul8table, div8table, path2DTypesID, path2DNumTypesID, path2DWindingRuleID, path2DFloatCoordsID, sg2dStrokeHintID, sunHints_INTVAL_STROKE_PURE.
 * Despite the name, the symbol SurfaceData_DisposeOps is not exported. Is it unused?

In libfreetype:
 * All symbols are exported on all Unix platforms!